The U.S. Treasury, in a report to Congress, confirmed that crypto mixers can serve legitimate privacy functions on public blockchains, protecting personal, business, and charitable transactions. The report emphasizes that mixers are still frequently used for laundering stolen funds, urging Congress to clarify AML obligations for DeFi, support privacy-preserving digital identity tools, and consider powers to freeze suspicious digital assets. The document references past sanctions on Tornado Cash and stresses that privacy technologies are not inherently illegal.